Giant Factories ANSI Z21.10.3, Руководство пользователя

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8
Unit clearances
to side
to front
to top
to floor/ground
Vers le haut
Vers le côté
Vers l’avant
Vers le sol/plancher
to side
to front
to top
to floor/ground
Figure 6
Table 3
to Combustibles
inches (cm)
to Non
Combustibles
inches (cm)
Top of Heater 6 * (15.2) 2 *(5.1)
Back of Heater 0 (zero) 0 (zero)
Front of Heater 6 (15.2) 6 (15.2)
Sides of Heater 2 (5.1) 1/2 (1.3)
Ground/Bottom 12 (30.5) 12 (30.5)
Vent 0 (zero) 0 (zero)
*0 inch from vent components and condensate drain line
The clearance for servicing is twenty-four (24) inches (61 cm) in
front of the water heater.
For closet installation, clearance is six (6) inches (15.2 cm) from
the front.
Freeze Protection
In case of freezing weather, make sure that the water heater and
its water lines are protected to prevent freezing. Damage due to
freezing is not covered by the warranty.
Loss of freeze protection may result in water damage from a burst
heat exchanger or water lines.
With electrical power supplied, the water heater will not freeze
when the outside air temperature is as cold as –22°F (-30°C) for
indoor models,
when protected from direct wind exposure
.
Because of the “wind-chill” effect, any wind or air circulation on
the unit will reduce its ability to freeze protect.
The unit may be drained manually. However, it is highly recom-
mended that drain down solenoid valves are installed that will au-
tomatically drain the unit if power is lost. These are available in a
kit, P/N 15000029-A. (The condensate trap drain plug and water
drain plug are not affected by the auto drain down solenoid valves
and will have to be manually opened.)
In addition, the solenoid valves should be connected electrically to
a surge protector with terminals. This allows the solenoid valves
to operate if the water heater is disabled due to a diagnostic code.
The freeze protection features will not prevent the external piping
from freezing. It is recommended that hot and cold water pipes are
insulated. Pipe cover enclosures may be packed with insulation for
added freeze protection.
It is recommended that the condensate trap drain line be insulated.
A frozen condensate trap drain line results in diagnostic code #25.
In the event of a power failure at temperatures below freezing,
the water heater should be drained of all water to prevent freezing
damage. In addition, drain the condensate trap and drain line.
Maximum vent length
Maximum vent length with concentric venting
1) Determine the number of 90-degree elbows in the vent sys-
tem. (Two (2) 45-degree elbows count as one (1) 90-degree
elbow.)
2) Refer to the table to find the maximum vent length based on
the number of elbows.
Table 4
Number of
90
0
Elbows
Maximum vent length
(concentric venting)
0 41 ft (12.5 m)
1
1 35 ft (10.7 m)
2
2 29 ft (8.8 m)
3
3 23 ft (7.0 m)
4
4 17 ft (5.2 m)
4
5 11 ft (3.4 m)
4
6 5 ft (1.5 m)
4
3) Adjust switch # 1 in the SW1 DIP switch (tan switches), if
required by the applicable note.
1. If the length is greater than twenty-one (21) feet (6.4 m),
then move switch # 1 (SW1) to OFF.
2. If the length is greater than fifteen (15) feet (4.5 m), then
move switch # 1 (SW1) to OFF.
3. If the length is greater than nine (9) feet (2.7 m), then
move switch # 1 (SW1) to OFF.
4. Move switch # 1 (SW1) to OFF.
Example: If you have one elbow, then your maximum
vent length is thirty-five (35) feet (10.7 m). If your actual
length is greater than fifteen (15) feet (4.5 m), then move
switch # 1 (SW1) to OFF.
INSTALLATION INSTRUCTIONS INSTALLATION INSTRUCTIONS